Flame-retardant and leakage-proof phase change composites based on MXene/polyimide aerogels toward solar thermal energy harvesting

To address the problems of easy leakage and high flammability of phase change materials, a series of innovative leakage-proof phase change composites (PCCs) with excellent solar thermal conversion capability and superior flame retardancy have been successfully developed. Herein, two-dimensional laye...

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Published inAdvanced composites and hybrid materials Vol. 5; no. 2; pp. 1253 - 1267
Main Authors Cao, Yan, Weng, Mengman, Mahmoud, M. H. H., Elnaggar, Ashraf Y., Zhang, Li, El Azab, Islam H., Chen, Ying, Huang, Mina, Huang, Jintao, Sheng, Xinxin
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.06.2022
Subjects
Ceramics
Chemistry and Materials Science
Composites
Glass
Materials Engineering
Materials Science
Natural Materials
Original Research
Polymer Sciences
Phase change materials
Solar-thermal conversion
Flame retardancy
Thermal energy storage
MXene
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Summary:To address the problems of easy leakage and high flammability of phase change materials, a series of innovative leakage-proof phase change composites (PCCs) with excellent solar thermal conversion capability and superior flame retardancy have been successfully developed. Herein, two-dimensional layered MXene nanosheets with excellent solar-thermal conversion effect were first synthesized by etching MAX phase with lithium fluoride and hydrochloric acid solutions. MXene/polyimide (PI) aerogel was then prepared by freeze-drying and thermal imidization after MXene dispersions mixed with poly (amic acid). The MXene/PI aerogels were subsequently impregnated into polyethylene glycol (PEG) by vacuum impregnation to obtain new shape-stable MXene/PI@PEG phase change composites (MPPCCs). Among them, MPPCC-4 exhibits a very high PEG loading capacity (98.1%) and high enthalpy (167.9 J/g), and a relative enthalpy efficiency of 99.8%. When compared to PEG, MPPCC-4 has outstanding flame retardant properties, including a 26.2% lower peak heat release rate and an 11.6% lower total heat release rate. In conclusion, MPPCCs show considerable potential for application in solar energy utilization systems. Graphical abstract MXene/polyimide hybrid aerogel supported phase change composites show excellent solar thermal energy harvesting and flame-retardant property.
ISSN:2522-0128
2522-0136
DOI:10.1007/s42114-022-00504-4